| 摘要 |
PURPOSE:To realize the rotary preset channel selection which features a small amount of force necessary for the rotary operation to perform the channel selection along with the excellent controllability by holding the memory device via the 2nd cam face at the maximum shift position caused by the 1st cam face until turning by the fixed angle. CONSTITUTION:The value prescribed from outside can be adjusted for memory device 29 which can turn freely, and cam 36 possessing cam faces 37 and 38 has turning according to the turn of device 29. Movable piece 19 touches cam 36 elastically and also shifts the tuning element against the energizing force. Piece 19 is shifted from cam face 37 and then moved up to the maximum shift position to be held 38 by face 37 until device 29 has been turned to the fixed angle. Thus the turning of device 29 can be made best use to the temporary shift of the tuning element, thus reducing the force necessary for the rotary operation to perform the channel selection. As a result, the rotary preset channel selection is possible with excellent controllability. |
